Metal-founder&#39;s mold.



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J. P. DIGAN. METAL FOUNDERS MOLD. APPLICATION FILED AUG. 31. 1910.

Patented Mar.21,1911.

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CZZZOrnEey UNFFED @TATES PATENT @FFlfiE JAMES FRANCIS DIGAN, OFLOGANSPORT, INDIANA, ASSIGNOR TO LUGANSPORT RADIATOR EQUIPMENT COMPANY,OF LOGANSPORT, INDIANA.

METAL-FOUNDERS MOLD.

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Specification of Letters Patent.

Application filed August 31, 1910.

Fatented Mar. 21, 1911. Serial No. 579,838.

To all whom it may concern:

Be it known that 1, JAMES FRANCIS DIGAN, a citizen of the United States,residing at Logansport, Cass county, Indiana, have in vented certain newand useful Improvements in Metal-Founders Molds, of which the followingis a specification.

In sand molds constructed on the twin system, as often used in themaking of radiator-sections, one radiator column or section will bemolded in one-half of the flask and the other column in the other halfof the flask, the two halves of the flask being separated by apartition. In pouring one of the halves the gas frequently passesthrough the parting between the half-molds and causes the loss of thecasting when the other column is poured.

My invention aims to remedy the abovementioned evil, and the inventionwill be readily understood from the following description taken inconnection with the accompanying drawing in which Figure l is an endelevation of a hal mold embodying my invention. Fig. 2 a verticaltransverse section of the same: and Fig. 3 a vertical transverse sectionof a portion of the mold in modified form.

In the drawing :1, indicates the usual half-flask: 2, the usualdowel-ears: 3, the longitudinal partition dividing the halffiask intotwin sand-receiving compartments: l, the rammed sand in one of thecompartments: 5, the rammed sane in the other compartment: 6, the moldcavity in the face of sand 4, this cavity pertaining to a radiatorcolumn: 7 the mold cavity in the face of the sand in the othercompartment and pertaining to the second radiator column: 8, notches inthe end walls of the flask: and 9, grooves formed in the face of thesand, one groove at each side of the flask-partition, these groovescommunicating with the notches 8 in the walls of the flask.

The grooves 9 may be formed by suitable strips on the follow-boardbearing the patterns which form the cavities 6 and 7. The notches 8 andgrooves 9 may be formed either in the cope or the drag or in both.

i i l Gas forming in one of the mold cavities and seeking to passthrough the parting joint and reach the other mold cavity will have anopportunity to escape through the grooves 9 and notches 8, thuspreventing the pouring of one-half of the mold from producing evileffects in the other half of the mold.

In the example illustrated in Fig. 2 the grooves 9 'are formed in thesand, the pair of grooves straddling the central partition and providinga plurality of passages for the gases.

In the modification illustrated in Fig. 3, instead of forming thegrooves in the sand of the mold, and forming them in duplicate, singlegroove 10 is employed and this groove is formed directly in the jointface of the central partition 3, this groove extending the length of thepartition and communicating with grooves in the end walls of the flaskas in the former case.

I claim 1. A mold comprising a half flask provided with a partitionseparating it into two compartments, a sand mold formed in eachcompartment, a groove extending through the flask near to and in thedirection of the partition, and formed in the parting plane between theupper and lower flask sections,

said groove not being connected directly with a mold cavity, and outletsthrough the walls of the flask communicating with the groove.

2. A mold comprising, a half flask provided with a partition separatingit into two compartments, a sand mold formed in each compartment andhaving each a mold cavity in its face, a groove extending through theflask between the two mold cavities in the portion of the partingbetween the u: er and lower flask sections said groove not beingconnected directly with a mold cavity, and outlets through the end wallsof the flask communicating wlth said groove.

JAMES FRANCIS DIGnN.

Witnesses ROSE ALEXANDER, JOHN S. BURKE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner Washington, D. O.

of Eatents,

